Microsoft.Extensions.Caching.StackExchangeRedis SetString BUG

[dashiell-zhang]

My project uses Microsoft.Extensions.Caching.StackExchangeRedis as the implementation of distributed cache. When connected to Garnet, the Set action will return an ERR unknown command exception.

IDistributedCache distributedCache

distributedCache.SetString(key, value, new DistributedCacheEntryOptions { AbsoluteExpirationRelativeToNow = absoluteExpirationRelativeToNow });

ERR unknown command

[yzy613]

Currently, garnet does not fully support all redis commands.

[douglasg14b]

What commands are unsupported for this scenario?

[davidglassborow]

See #85

[yzy613]

What commands are unsupported for this scenario?

You can see api-compatibility.

[badrishc]

Can you provide a simple repro - it should be possible to detect what variant of SET is being sent and add that relatively easily.

[badrishc]

Or, just run the Garnet server in Debug mode with these three lines uncommented and with --logger-level Trace, then it will tell you what was received and unable to handle:

https://github.com/microsoft/garnet/blob/main/libs/server/Resp/RespServerSession.cs#L241

[davidglassborow]

All the details are on #85

• The Redis IDistributedCache implementation depends on Lua
• It doesn't need to, the area owner has raised an issue and PR Redis distributed cache does not need to use Lua dotnet/aspnetcore#54685

[badrishc]

Closing as the error will resolve once the above PR eliminating Lua merges.